In theory, yes. DC power = I.V. So 180W at 15V is, indeed, 12A. However, that is taking the '180W' to be the output power of the supply. In many cases, the 180W is the maximum power it will consume from the mains. And as power supplies are not 100% efficient, you don't get out all the power you put in. In fact, the efficiency might only be 50% (particularly if it's a linear PSU), so you could only draw 6A from it. I'd probably not take more than that from it, unless I _knew_ it was designed to stand it. -tony